## Introduction: BEARD TRIMMER BECOMES a MUSIC PLAYER

Though our beard trimmer are not used to produce music but can they even be used to produce music .

so in this article I will tell you how I created MUSIC using my beard trimmer and what's the circuit I designed for it

So let's get started but before that ,

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YOUTUBE CHANNEL : MUSICAL BEARD TRIMMER ( GO ELECTRONICS)

## Step 1: WHAT'S a SPEAKER??

SO if it comes to music our first choices seem to wander around speakers and audio amplifiers . But do we know the basic principle behind working of our speakers .

so first let us understand the underlying principles behind working of a speaker .

Speaker has a small coil and a magnet and a plastic enclosure on it .

## Step 2: WORKING PRINCIPLE OF SPEAKER

SO the main working principle is the faradays law of electromagnetic induction.

Lets go a bit deeper

Sounds travels as form of an AC signal or a bidirectional signal and when an AC signal is applied to a coil with permanent magnetic field provided by permanent magnet .

the coil moves back and forth by the law of electromagnetic induction.

Thus it vibrates with an alternating frequency (provided as form of music) . And thus produces MUSIC .

so now we have to think how can we produce music with a beard trimmer .

## Step 3: DESIGNING a CIRCUIT

SO first of we have to think rationally that trimmer consist of a motor and motor can run only through a PWM signal so now we have to convert a MUSIC ( AC signal) in PWM signal or encrypt it lol !!!!

BUT jokes apart let me explain you the circuit now .

FIRSTLY we will connect our audio jacks pins with the 10k resistors and then to a 100k potentiometer to adjust the amplitude as per out requirement .

As music signals from our mobile phones are about 1Volt Peak to Peak so we have to amplify it using a OPAMP ( sorry but there is a mistake in schematic the feedback resistor or R5 is 5k), AND now when the signal becomes about peak to peak of 5Volts .

it is then compared using a COMPARATOR. the comparator compares the AC signal with the constant voltage set by voltage divider .

As you can see in the image .

and final stage includes driving the motor using a MOSFET (as switch) .

And voila our musical beard trimmer is ready .

## Step 4: WHERE'S THE MUSIC COMING

BUT WAIT YOU MIGHT WHERE'S THE MUSIC COMING FROM

SO TO END THE ARTICLE WITH A FINAL EXPLANATION/.

The main cause of music is the permanent magnet of motor reacting to PWM (variable pulses as per music )

and armatures winding becomes the coil in this case

And even more important are the HUMMING LOSSES in the armature .

SO the motor rotates as per the music and produces a clearly audible music .

## Step 5: WATCH THE VIDEO AND ENJOY

At about 3 minutes there will be shape of you played and you can hear it

it's not that clear because motor can act aa audio transformer but it's fun to play with . THANK YOU ALL but please support me by subscribing to my channel if you love the videos and stay tuned for more videos like this.